Version 36.2 by Xiaoling on 2022/06/25 17:33
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13 **Table of Contents:**
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15 {{toc/}}
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24
25 = 1. Introduction =
26
27 == 1.1 What is LWL02 LoRaWAN Water Leak Sensor ==
28
29
30 (((
31 The Dragino LWL02 is a (% style="color:#4f81bd" %)**LoRaWAN Water Sensor**(%%). When there is water between the two metal probes, LWL02 indicates a water leak event and uplink to IoT server via LoRaWAN network.
32 )))
33
34 (((
35 LWL02 is powered by (% style="color:#4f81bd" %)**2 x AAA batteries**(%%) and target for long time use, these two batteries can provide about 16,000 ~~ 70,000 uplink packets, which result in 2 ~~ 10 years battery life. After battery running out, user can easily open the enclosure and replace with 2 common AAA batteries.
36 )))
37
38 (((
39 The LWL02 will send periodically data every day as well as for each water leak event. It also (% style="color:#4f81bd" %)**counts the water leak times**(%%) and (% style="color:#4f81bd" %)**calculate last water leak duration**(%%). User can also disable the uplink for each water leak event, instead, device can count each event and uplink periodically.
40 )))
41
42 (((
43 Each LWL02 is (% style="color:#4f81bd" %)**pre-load with a set of unique keys**(%%) for LoRaWAN registration, register these keys to LoRaWAN server and it will auto connect after power on.
44 )))
45
46 [[image:image-20220608143744-1.png]]
47
48
49
50 == 1.2 Features ==
51
52 * LoRaWAN Class A v1.0.3
53 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864
54 * SX1262 LoRa Core
55 * Water Leak detect
56 * 2 x AAA LR03 Batteries
57 * AT Commands to change parameters
58 * Uplink on periodically and open/close action
59 * Remote configure parameters via LoRa Downlink
60 * Firmware upgradable via program port
61
62 == 1.3 Applications ==
63
64 * Smart Buildings & Home Automation
65 * Logistics and Supply Chain Management
66 * Smart Metering
67 * Smart Agriculture
68 * Smart Cities
69 * Smart Factory
70
71 == 1.4 Dimension ==
72
73 [[image:image-20220608143952-2.png]]
74
75 [[image:1654670405145-346.png]]
76
77
78
79 == 1.5 Firmware Change log ==
80
81 (((
82 LWL02 use the same firmware as LDS01.
83 )))
84
85 (((
86 [[LWL02 Image files – Download link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDS01/Firmware/]]
87 )))
88
89
90 = 2. Power ON LWL02 =
91
92 When receive the LWL02, please open the enclosure and add 2 x AAA batteries to power it. The [[LED>>||anchor="H4.7LEDs"]] will blink when device is powered.
93
94
95 = 3. How to install LWL02 =
96
97 (((
98 When install the LWL02 on wall. Please install as below so the water leak probe will be soak in water for water detect purpose. The LWL02 main body is not water proof. Please don’t let water go inside the LWL02 main body.
99 )))
100
101 [[image:image-20220608144447-4.png]]
102
103
104
105 = 4. Operation Mode =
106
107 == 4.1 How it works? ==
108
109 (((
110 The LWL02 is configured as LoRaWAN OTAA Class A mode by default. It has OTAA keys to join network. To connect a local LoRaWAN network, user just need to input the OTAA keys in the network server and [[power on>>||anchor="H2.PowerONLWL02"]] the LWL02. It will auto join the network via OTAA.
111 )))
112
113 (((
114 In case user can’t set the OTAA keys in the network server and has to use the existing keys from server. User can [[use AT Command>>||anchor="H6.UseATCommand"]] to set the keys in the devices.
115 )))
116
117
118 == 4.2 Example to join LoRaWAN network ==
119
120 Here shows an example for how to join the [[TTN V3 Network>>url:https://eu1.cloud.thethings.network/]]. Below is the network structure, we use [[LG308>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/140-lg308.html]] as LoRaWAN gateway here. 
121
122 [[image:1654671007127-335.png]]
123
124
125 (((
126 The LWL02 has water leak detect probe as above. When there is water between these two detect probe, they will be short and generate the water leak event. and send the status to LoRaWAN server. The LWL02 will uplink two type of messages to the server.
127 )))
128
129 * (((
130 A keep-alive message which send once per day.
131 )))
132 * (((
133 An emergency event message when detect a water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
134 )))
135 * (((
136 A periodically update at every 10 minutes when in water leak.
137 )))
138 * (((
139 A message when switch from water leak to none water leak. ([[Alarm event can be disabled>>||anchor="H7.3CanIdisableuplinkforeacheventtosavebatterylife3F"]])
140 )))
141
142 (((
143
144
145 The LG308 is already set to connect to [[TTN V3 network >>url:https://eu1.cloud.thethings.network/]]. What we need to now is only configure the TTN V3:
146 )))
147
148 (((
149 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN V3 with the OTAA keys from LWL02.
150 )))
151
152 (((
153 Each LWL02 is shipped with a sticker with unique device EUI:
154 )))
155
156 [[image:1654671040430-368.png]]
157
158
159 User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
160
161 **Add APP EUI in the application**
162
163 [[image:1654671794691-956.png]]
164
165
166 [[image:1654671809850-574.png]]
167
168 [[image:1654671820156-640.png]]
169
170
171 [[image:1654671832011-696.png]]
172
173
174 **Add APP KEY and DEV EUI**
175
176 [[image:1654671889112-678.png]]
177
178
179 (% style="color:blue" %)**Step 2**(%%): **[[Power on>>||anchor="H2.PowerONLWL02"]]** LWL02 and it will auto join to the TTN V3 network. After join success, it will start to upload message to TTN V3 and user can see in the panel.
180
181
182 [[image:1654681465260-713.png]]
183
184
185
186 == 4.3 Uplink Payload ==
187
188
189 Uplink Payload total 9 bytes.
190
191 [[image:image-20220608150921-5.png]]
192
193
194 **Example:**
195
196 [[image:1654672186477-234.png]]
197
198
199 (((
200 Example Payload Decoder in TTN V3: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDS01/Payload/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDS01/Payload/]]
201 )))
202
203
204 == 4.4 Downlink Payload ==
205
206
207 (% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:410px" %)
208 |=(% style="width: 180px;" %)**Downlink Control Type**|=(% style="width: 80px;" %)**Type Code**|=(% style="width: 150px;" %)**Downlink payload size(bytes)**
209 |(% style="width:180px" %)TDC (Transmit Time Interval—Keep Alive Interval)|(% style="width:80px" %)0x01|(% style="width:150px" %)4
210 |(% style="width:180px" %)RESET|(% style="width:80px" %)0x04|(% style="width:224px" %)2
211 |(% style="width:180px" %)[[Set confirmed mode>>||anchor="HTypeCode0x05"]]|(% style="width:80px" %)0x05|(% style="width:150px" %)2
212 |(% style="width:180px" %)[[Clear Counting>>||anchor="HTypeCode0xA6"]]|(% style="width:80px" %)0xA6|(% style="width:150px" %)2
213 |(% style="width:180px" %)[[Enable/Disable Alarm>>||anchor="HTypeCode0xA7"]]|(% style="width:80px" %)0xA7|(% style="width:150px" %)2
214 |(% style="width:180px" %)[[Control ADR/DR>>||anchor="HTypeCode0xA8"]]|(% style="width:80px" %)0xA8|(% style="width:150px" %)3
215 |(% style="width:180px" %)[[Set Alarm Timeout>>||anchor="HTypeCode0xA9"]]|(% style="width:80px" %)0xA9|(% style="width:150px" %)4
216
217 Example Downlink payload setting in TTN V3:
218
219 [[image:1654673412319-976.png]]
220
221
222 === (% style="color:#037691" %)**Type Code 0x01**(%%) ===
223
224 If the payload=0100003C, means to control the LWL02’s Keep Alive interval to 0x00003C=60(S)
225
226
227 === (% style="color:#037691" %)**Type Code 0x04**(%%) ===
228
229 If payload = 0x04FF, it will reset the LWL02.
230
231
232 === (% style="color:#037691" %)**Type Code 0x05**(%%) ===
233
234 0x05 00: Set uplink to LoRaWAN unconfirmed mode
235
236 0x05 01: Set uplink to LoRaWAN confirmed mode
237
238
239 === (% style="color:#037691" %)**Type Code 0xA6**(%%) ===
240
241 Example: 0xA601: Clear Counting
242 For LWL02: reset both count number and time.
243
244
245 === (% style="color:#037691" %)**Type Code 0xA7**(%%) ===
246
247 0xA7 01 : Equal to AT+DISALARM=1
248
249 0xA7 00 : Equal to AT+DISALARM=0
250
251
252 === (% style="color:#037691" %)**Type Code 0xA8**(%%) ===
253
254 Format: 0xA8 aa bb
255
256 aa: 1: Enable ADR; 0: Disable ADR (Same as AT+CADR command)
257
258 bb: set DR (Same as AT+CDATARATE ,only valid after ADR=0)
259
260 Example: 0x A8 00 02 : Set ADR=0 and DR=1
261
262
263 === (% style="color:#037691" %)**Type Code 0xA9**(%%) ===
264
265 See [[Alarm Base Timeout>>||anchor="H4.6AlarmBaseonTimeout"]] for detail.
266
267
268 == 4.5 Integrate with Datacake ==
269
270 (((
271 Datacake provides a human friendly interface to show the sensor data, once we have data in TTN V3, we can use Datacake to connect to TTN V3 and see the data in Datacake. Below are the steps:
272 )))
273
274
275 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
276
277 (% style="color:blue" %)**Step 2**(%%): To configure the Application to forward data to Datacake you will need to add integration. To add the Datacake integration, perform the following steps:
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279
280 [[image:1654674520913-519.png]]
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283 [[image:1654674530910-914.png]]
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285
286 [[image:1654674543078-401.png]]
287
288
289 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Datacake.
290
291 (% style="color:blue" %)**Step 4**(%%): Search LWL02 and add DevEUI.
292
293 [[image:1654674556510-911.png]]
294
295
296 == 4.6 Alarm Base on Timeout ==
297
298 (((
299 LWL02 can monitor the timeout for a status change, this feature can be used to monitor some event such as open fridge too long etc.
300 )))
301
302 (((
303 User configure this feature by using:
304 )))
305
306 (((
307
308 )))
309
310 (((
311 (% style="color:blue" %)**AT Command**(%%) to configure:
312 )))
313
314 * (((
315 **AT+TTRIG=1,30 ** **~-~->** When status change from close to open, and device keep in open
316 )))
317
318 (((
319 status for more than 30 seconds. LWL02 will send an uplink packet, the Alarm bit (the lowest bit of 10^^th^^ byte of payload) on this uplink packet is set to 1.
320 )))
321
322 * (((
323 **AT+TTIG=0,0**  **~-~->**  Default Value, disable timeout Alarm.
324 )))
325
326 (((
327 (% style="color:blue" %)**Downlink Command**(%%) to configure:
328 )))
329
330 (((
331 **Command: 0xA9 aa bb cc**
332 )))
333
334 (((
335 A9: Command Type Code
336 )))
337
338 (((
339 aa: status to be monitor
340 )))
341
342 (((
343 bb cc: timeout.
344 )))
345
346 (((
347
348 )))
349
350 (((
351 If user send 0xA9 01 00 1E: equal to AT+TTRIG=1,30
352 )))
353
354 (((
355 Or
356 )))
357
358 (((
359 0xA9 00 00 00: Equal to AT+TTRIG=0,0. Disable timeout Alarm.
360 )))
361
362
363
364 == 4.7 LEDs ==
365
366
367 (% border="1" cellspacing="10" style="background-color:#ffffcc; width:463px" %)
368 |=(% style="width: 184px;" %)**Action**|=(% style="width: 275px;" %)**LED behavior**
369 |(% style="width:184px" %)Power On|(% style="width:275px" %)(% style="color:green" %)**GREEN on 1s, **(% style="color:red" %)**RED on 1s,**(%%)** (% style="color:blue" %)BLUE on 1s(%%)**
370 |(% style="width:184px" %)Joined successful|(% style="width:275px" %)(% style="color:green" %)**GRENN LED **(%%)on 5s
371 |(% style="width:184px" %)Send an uplink message|(% style="width:275px" %)(% style="color:green" %)**GREEN LED**(%%) blinks once
372 |(% style="width:184px" %)Got a downlink message|(% style="width:275px" %)(% style="color:blue" %)**BLUE LED**(%%) blinks once
373
374 = 5. Battery & How to replace =
375
376 == 5.1 Battery Type and replace ==
377
378 (((
379 LWL02 is equipped with 2 x AAA LR03 batteries. If the batteries running low(see 2.1v in the platform). User can buy generic AAA battery and replace it. Note:
380 )))
381
382 1. (((
383 The LWL02 doesn’t have any screw, use can use nail to open it by the middle.
384 )))
385 1. (((
386 Make sure the direction is correct when install the AAA batteries.
387 )))
388
389 (((
390 (% style="color:red" %)**Important Notice: Make sure use new AAA LR03 battery and the battery doesn’t have broken surface.**
391 )))
392
393 (((
394
395 )))
396
397 (((
398 Example of AAA LR03 batter:
399 )))
400
401 [[image:1654675278044-307.png]]
402
403
404 == 5.2 Power Consumption Analyze ==
405
406 (((
407 Dragino battery powered products are all run in Low Power mode. User can check the guideline from this link to calculate the estimate battery life:
408 )))
409
410 (((
411 [[https:~~/~~/www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf>>url:https://www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf]]
412 )))
413
414
415 = 6. Use AT Command =
416
417 == 6.1 Access AT Command ==
418
419 LWL02 supports AT Command set. User can use a USB to TTL adapter to configure LWL02 via use AT command, as below.
420
421 [[image:image-20220608160336-1.png]]
422
423
424 (% style="background-color:yellow" %)**USB to TTL <- -> LWL02**
425
426 (% style="background-color:yellow" %)**RX <- -> TX**
427
428 (% style="background-color:yellow" %)**TX <- -> RX**
429
430 (% style="background-color:yellow" %)**GND <- -> GND**
431
432
433 (((
434 In PC, User needs to set (% style="color:#037691" %)**serial tool**(%%)(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**115200**(%%) to access to access serial console of LWL02. Below is the output for reference:
435 )))
436
437 (((
438 The AT Access password is (% style="color:red" %)**123456**.
439 )))
440
441 [[image:1654675618022-630.png]]
442
443 (((
444 Each AT Command need to (% style="color:red" %)**add an ENTER**(%%) at the end before send.
445 )))
446
447 (((
448 When entering the first command, the (% style="color:red" %)**RED LED**(%%) will on and user can now input AT Commands. After input all needed AT Commands, please input AT+CLPM=1 to set the device to work in Low Power mode and (% style="color:red" %)**RED LED**(%%) will be off.
449 )))
450
451 (((
452 More detail AT Command manual can be found at [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDS01/]]
453 )))
454
455
456 = 7. FAQ =
457
458 == 7.1 How to upgrade the image? ==
459
460 User can upgrade the of LWL02 for bug fix, new features, or change working region. The upgrade instruction is here: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
461
462
463 == 7.2 How to change the LoRa Frequency Bands/Region? ==
464
465 If user has for example US915 frequency and want to change it to AS923 frequency. User can follow the introduction for [[how to upgrade image>>||anchor="H7.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
466
467
468 == 7.3 Can I disable uplink for each event to save battery life? ==
469
470 Yes, User can use below method to disable this:
471
472 (% style="color:#4f81bd" %)**via AT Command**:
473
474 AT+DISALARM=1,  End node will only send packet in TDC time.
475
476 AT+DISALARM=0,  End node will send packet in TDC time or status change for door sensor. 
477
478
479 (% style="color:#4f81bd" %)**via LoRaWAN downlink Command**:
480
481 0xA701 :  Equal to AT+DISALARM=1
482
483 0xA700 :  Equal to AT+DISALARM=0
484
485
486 = 8. Order Info =
487
488 **Part Number: (% style="color:blue" %)LWL02-XXX(%%)**
489
490 (% style="color:blue" %)**XXX:**
491
492 * (% style="color:red" %)**EU433**(%%): frequency  bands EU433
493 * (% style="color:red" %)**EU868**(%%): frequency  bands EU868
494 * (% style="color:red" %)**KR920**(%%): frequency  bands KR920
495 * (% style="color:red" %)**CN470**(%%): frequency bands CN470
496 * (% style="color:red" %)**AS923**(%%): frequency  bands AS923
497 * (% style="color:red" %)**AU915**(%%): frequency bands AU915
498 * (% style="color:red" %)**US915**(%%): frequency bands  US915
499 * (% style="color:red" %)**IN865**(%%):  frequency bands  IN865
500 * (% style="color:red" %)**CN779**(%%): frequency bands CN779
501
502 = 9. Packing Info =
503
504 **Package Includes**:
505
506 * LWL02 x 1
507
508 = 10. Support =
509
510 * Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
511 * Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]].
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